The journal Neurology published an article describing the results of a study that confirmed a strong association between low levels of vitamin D and increased risk of dementia and Alzheimer’s disease in elderly people in the U.S. Here’s a breakdown of the research.
Background
There is a lot of interest in understanding the impact of vitamin D levels in people with Alzheimer’s

Children who are physically fit have faster and more robust neuro-electrical brain responses during reading than their less-fit peers, researchers report.

These differences correspond with better language skills in the children who are more fit, and occur whether they’re reading straightforward sentences or sentences that contain errors of grammar or syntax.

The new findings, reported in the journal Brain and Cognition, do not prove that higher fitness directly influences the changes seen in the electrical activity of the brain, the researchers say, but offer a potential mechanism to explain why fitness correlates so closely with better cognitive performance on a variety of tasks.